Financing / Crowdfunding : Have you used a PR/Marketing company for a crowdfunding campaign? by Rebecca Loyd

I will be launching a crowdfunding campaign for my action-comedy web series in the near future. Since crowdfunding success depends heavily on promotion I am looking at/considering using an online PR/Marketing company to help in that department. I was wondering if anyone out there had gone this route with their crowdfunding campaign and if they would recommend it. And if so, if there was a company they would recommend. Ideally, one that has worked with crowdfunding campaigns for film before.